Control of PEMFC Air Supply Subsystem Using Triple-Step Method

In this paper, the control targets are the low rate into the cathode and the pressure of the cathode. Firstly, the typical structure of the proton-exchange membrane fuel cell (PEMFC) air supply subsystem is briefly introduced and a simplified multi-input and multi-output (MIMO) air supply subsystem of a PEMFC is proposed. Then optimize the tracking targets under different load currents and establish a map between load current and tracking targets. Finally a nonlinear controller called the triple-step method is designed and the stability of the system is proved by Lyapunov stability theory. The simulation results show good performance that the system can quickly track the targets with no steady-state error when tracking targets and load current step-change.